A Comparative Study Between Once‐Weekly and Alternating Twice‐Weekly Regimen Using Blue (470 nm) and Red (640 nm) Light Combination LED Phototherapy for Moderate‐to‐Severe Acne Vulgaris

Phototherapy for acne with a combination of blue and red light‐emitting diodes (LEDs) appears to have excellent potential in treating inflammatory acne. However, a standard twice‐weekly protocol administered 3 days apart may not be practical for patients. This study aims to seek the efficacy of LED treatment in moderate to severe acne, comparing between once and alternating twice‐weekly regimens.

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